Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba59e9ee00f6a6e…

MALICIOUS

PDF

92.8 KB Created: 2021-07-23 16:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7fcf0b53ddf692d7e92d05daa4af2893 SHA-1: 1c170e405fceb1467764b91d74585cea1d18a50d SHA-256: 7ba59e9ee00f6a6e7fc286741aa6fe9a0368af45d9a2eaa317f7d228fe5d896e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to compromised WordPress uploads and disposable hosting sites. These sites likely host further malicious content or phishing pages, serving as a lure to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://stopserv.ru/files/file/kinet.pdf In PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/cf37aaac8b025313fe95639e34a656d5/pamasonagofitevomokodud.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/jevaxuxelesazapof.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/oc3v382s177e1i450fdjvu5pi1/84757356122.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4844dfb339dff5d7afa3be5e7d47790f/65782778820.pdfIn PDF document text
    • http://apsons.eu/files/file/jedezodatatizu.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4e48bb259---32015439285.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/sfkqfkhgivpoo103f2gad21p10/jusaxobe.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/3a0fb11c04ab0d9ad00483abb59ff02c/30105366360.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3dea8e6b0d---dakexoduwukesi.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/64887629421.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/hfi0dmivntodh0h2d60fk090n0/vopebifuz.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/35826580190e9cd206f38e041fc8bfae/ralilejizagobegunaxo.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/9009940693.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/29479611132.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/jeruvaruletutew.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aabb880cb89---leduzovixujiw.pdfIn PDF document text
    • https://latework.cz/soubory/bojujubemurari.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9efe5f261870b8a5cdb767d3e5dbb02a/42215983245.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/88878034316.pdfIn PDF document text
    • https://melz-feu.ru/upload/47722861464.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5b0f3464460ec1e99ed88f0c224692da/butimazimazurukeledobaz.pdfIn PDF document text
    • http://tipiland.net/upload/file/46163143865.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/sudurisupaduwetifo.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a9d86e80d---13387954183.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5e671faf1---87262571259.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/sabizipenesanadolisur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=left+colectomy+procedurePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C6 16920 bytes
SHA-256: 0d51fa3a68f9289728ffee6d88d999659ee2803897f751244f6bdfbb8fecf321
font_02_sfnt_off00014dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC2 10424 bytes
SHA-256: 15dfab0ab7739669a756e0ead8fa85efea5aa500bae53b0eb728f89eddf4226b

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